Multiple Choice
Efferent and afferent neurons pass through which structures to enter the spinal cord?
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12. The Central Nervous System
Introduction to the Central Nervous System
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Which of the following basic functions is performed exclusively by the spinal cord within the central nervous system?
A
Conscious thought processing
B
Reflex actions
C
Interpretation of sensory information
D
Regulation of heart rate
Verified step by step guidance1
Understand the role of the spinal cord within the central nervous system (CNS). The spinal cord is primarily responsible for transmitting signals between the brain and the rest of the body, as well as performing certain automatic functions like reflex actions.
Recognize that reflex actions are involuntary and immediate responses to stimuli, which are processed exclusively by the spinal cord without involving the brain. This allows for rapid responses to potentially harmful stimuli.
Differentiate reflex actions from other CNS functions such as conscious thought processing, interpretation of sensory information, and regulation of heart rate. These functions involve higher brain centers like the cerebrum, thalamus, or medulla oblongata.
Identify that reflex actions are unique to the spinal cord because they bypass the brain entirely, utilizing neural circuits called reflex arcs. Reflex arcs consist of sensory neurons, interneurons in the spinal cord, and motor neurons.
Conclude that the spinal cord's exclusive function within the CNS is reflex actions, as other listed functions require brain involvement.
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